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<table cellspacing="0" cellpadding="0" width="629" border="0"><tbody><tr><td style="width: 629px" valign="top"><a name="startcontent" /><span class="ds"><span class="lu">Last Updated: </span>Tuesday, 12 February 2008, 11:03 GMT</span> <div class="mvb"></div><div class="mvtb"><table cellspacing="0" cellpadding="0" width="416" border="0"><tbody><tr><td style="width: 213px"> E-mail this to a friend </td><td style="width: 203px"> Printable version </td></tr></tbody></table></div></td></tr></tbody></table><table cellspacing="0" cellpadding="0" width="629" border="0"><tbody><tr><td colspan="3"><div class="mxb"><div class="sh">Keeper Muller has knee operation </div></div></td></tr><tr><td style="width: 416px" valign="top"><font size="2"><table cellspacing="0" cellpadding="0" width="203" align="right" border="0"><tbody><tr><td><div> <div class="cap">Muller joined from Norwegian side Lillestrom in summer 2007</div></div></td></tr></tbody></table>Barnsley goalkeeper Heinz Muller has had a successful operation on a ruptured anterior cruciate ligament and is set to return to Oakwell next week.

The 29-year-old picked up the injury in the 1-0 victory against Colchester in the Championship on 29 January. </p>

Muller will miss the rest of the season and could be out of action for up to nine months because of the knee injury. </p>

Meanwhile striker Miguel Mostto, 28, has joined Coronel Bolognesi in Peru on loan until the end of the season. </p></font></td></tr></tbody></table>